S.D. Codified Laws § 28-1-18
No person receiving a grant or whose needs are included in a grant under public assistance, as administered by the State of South Dakota, may at the same time receive a grant under any other type of public assistance administered by the State of South Dakota. However, a recipient of one of the other types of assistance may be the payee of a grant of temporary assistance for needy families for the benefit of a child or children under the payee's care. No person is eligible for any assistance or services from the State of South Dakota or its agencies or subdivisions until that person has exhausted all other sources of assistance or services available to the person or for which the person would be eligible if the person applied, including Veteran's Administration benefits, insurance, medical or hospital benefits, third-party liability, U.S. Public Health Services, Bureau of Indian Affairs, Department of Interior, Indian Health Service, or any other government or private entity, or any assistance or services provided by any agency of the United States government to an eligible person or to persons for whom the United States is responsible. Assistance or services under chapter 28-13 are not available sources for the purpose of this section.
SDCL 28-1-18